Glenn Anderson - Ultimate Survivalist - Glenn is very anti social and awkward, and only is really comfortable when out in the wilderness. He makes friends with Kim rather quickly though, as they have very similar hobbies. He's similar to Shuichi, but even less confident

I imagine his voice as middle to low pitch, and kind of shaky.

If I had to describe what I want his voice to sound like based on already existing Danganronpa characters, I would say Kiyotaka from danganronpa 1, but a lot less direct and more shaky and nervous.